Jvc-RCEZ-31-BB-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2006 Victor Company of Japan, LimitedNo.MB5932006/12CD PORTABLE SYSTEMMB593200612SERVICE MANUALRC-EZ35SB,RC-EZ35SE,RC-EZ35SEN,RC-EZ35SEV,RC-EZ31BB,RC-EZ31BE,RC-EZ31BEN,RC-EZ31BEVCOPYRIGHT © 2006 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-115 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12SERVICE POLICYNo service part is available for this model.Exchange only.1-2 (No.MB593)SPECIFICATIONRC-EZ35RC-EZ31Design and specifications are subject to change without notice.Compact disc player section Type Compact disc playerSignal detection Non-contact optical pick-up (semicondicator lazer)Number of channels 2 channelsRadio section Frequency ranges FM 87.5 MHz - 108.0 MHzAM 522 kHz - 1 629 kHzAntennas Telescopic antenna for FMFerrite core antenna for AMCassette deck section Track 4-track 2-channel stereoMotor Electronic governor DC motor for capstanHeads Hard permalloy head for recording/playback, magnetic head for eraseFast wind time Approx. 120 sec. (C-60 cassette)General Speaker 10 cm × 2 (4 , 3 W)Power output 4 W (2 W + 2 W) at 4 (10% THD) (IEC268-3)Output terminals PHONES × 1 (Ø 3.5 mm, stereo)Power supply AC 230 V , 50 HzDC 12 V (“R20/D (13F)“ cells × 8)Power consumption 17 W (at operation)1.5 W (at standby)Dimentions 435 mm (W) × 156 mm (H) × 241 mm (D)Mass Approx. 2.8 kg (without batteries)Compact disc player section Type Compact disc playerSignal detection Non-contact optical pick-up (semicondicator lazer)Number of channels 2 channelsRadio section Frequency ranges FM 88 MHz - 108.0 MHzAM 530 kHz - 1 600 kHzAntennas Telescopic antenna for FMFerrite core antenna for AMCassette deck section Track 4-track 2-channel stereoMotor Electronic governor DC motor for capstanHeads Hard permalloy head for recording/playback, magnetic head for eraseFast wind time Approx. 120 sec. (C-60 cassette)General Speaker 10 cm × 2 (4 , 3 W)Power output 4 W (2 W + 2 W) at 4 (10% THD) (IEC268-3)Output terminals PHONES × 1 (Ø 3.5 mm, stereo)Power supply AC 230 V , 50 HzDC 12 V (“R20/D (13F)“ cells × 8)Power consumption 13 W (at operation)1.5 W (at standby)Dimentions 435 mm (W) × 156 mm (H) × 241 mm (D)Mass Approx. 2.8 kg (without batteries)(No.MB593)1-3SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits. Services should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessarily be obtained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by ( ) onthe Parts List in the Service Manual. The use of a substitutereplacement which does not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and dressed with ties,clamps, tubings, barriers and the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedthat they have been returned to normal, after reassem-bling.(5) Leakage shock hazard testingAfter reassembling the product, always perform an isola-tion check on the exposed metal parts of the product (an-tenna terminals, knobs, metal cabinet, screw heads,headphone jack, control shafts, etc.) to be sure the productis safe to operate without danger of electrical shock.Do notuse a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a“Leakage Current Tester“, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any exposed metal part having a return path to thechassis, to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following manner. Connect a 1,500 10W resistorparalleled by a 0.15µF AC-type capacitor between an ex-posed metal part and a known good earth ground.Measure the AC voltage across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a returnpath to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4 Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the “ “ mark nearby are criticalfor safety. When replacing them, be sure to use the parts of thesame type and rating as specified by the manufacturer. (This regulation dose not Except the J and C version)Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE1-4 (No.MB593)1.5 Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiationwhen open. Do not stare into beam.(Others) Visible and/or invisible class 1M laser radiationwhen open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation whenopen and inter lock failed or defeated. Avoid directexposure to beam.4.CAUTION : This laser product uses visible and/or invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the laser is ableto function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS and PRINT!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck. WARNING LABEL and PRINT(No.MB593)1-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-6 (No.MB593)SECTION 3DISASSEMBLY3.1 Main body3.1.1 Removing the Rear cabinet assembly (See Fig.1 to 4)(1) Remove the four screws A and five screws B attaching theRear cabinet assembly. (See Fig.1)(2) Disconnect the Rod antenna wire from post pin of the Tun-er board assembly. (See Fig.2)(3) Disconnect the connector wire from Amplifier board as-sembly connected to connector CN101 of the Power trans-former board assembly. (See Fig.3)(4) Disconnect the connector wire from Capstan motor con-nected to connector CN102 of the Power transformerboard assembly. (See Fig.3)(5) Remove the solder the grand wire from Tuner board sol-dered to shield plate. (See Fig.4)Fig.1Fig.2Fig.3Fig.4ABBBRod antenna wireTuner board assembly Post pinPower transformer boardCN101CN102Ground wireShield plate(No.MB593)1-73.1.2 Removing the Top cabinet assembly (See Fig.5, 6)(1) Disconnect the connector wire from Cassette mechanismassembly connected to connector CN205 of the Amplifierboard assembly. (See Fig.5)(2) Disconnect the connector wire from speaker connected toconnector CN301 of the Amplifier board assembly. (SeeFig.5)(3) Remove the solder the grand wire from Cassette mecha-nism assembly soldered to Amplifier board assembly. (SeeFig.5)(4) Remove the three screws C attaching the Top cabinet as-sembly. (See Fig.6)Fig.5Fig.63.1.3 Removing the Cassette mechanism assembly (See Fig.7)(1) Remove the four screws D attaching the Cassette mecha-nism assembly.Fig.7CN205Ground wireCN301CCCDDD1-8 (No.MB593)3.1.4 Removing the Amplifier board assembly (See Fig.8, 9)(1) Disconnect the card wire from LCD board assembly con-nected to connector CN701 of the Amplifier board assem-bly. (See Fig.8)(2) Disconnect the connector wire from Amplifier board as-sembly connected to connector CN901 of the CD servoboard assembly. (See Fig.8)(3) Disconnect the connector wire from CD door switch con-nected to connector CN906 of the Amplifier board assem-bly. (See Fig.8)(4) Disconnect the connector wire from Amplifier board as-sembly connected to connector CN101 of the Tuner boardassembly. (See Fig.9)(5) Disconnect the connector wire from Amplifier board as-sembly connected to connector CN801 of the Headphonejack board assembly. (See Fig.9)(6) Remove the three screws E attaching the Amplifier boardassembly. (See Fig.8)Fig.8Fig.9EECN701 CN906CN901CD servo boardassemblyAmplifier boardassemblyCN801(No.MB593)1-93.1.5 Removing the Headphone jack board assembly (See Fig.10)(1) Remove the solder the grand wire from LCD board assem-bly soldered to Headphone jack board assembly.)(2) Remove the one screw F attaching the Headphone jackboard assembly.)(3) Disconnect the connector wire from Function board assem-bly connected to connector CN707 of the Headphoneboard assembly.Fig.103.1.6 Removing the Tuner board assembly (See Fig.11)(1) Remove the solder of the grand wire from Function boardassembly soldered to Tuner board assembly.(2) Disconnect the connector wire from Function board assem-bly connected to connector CN102 of the Tuner board as-sembly.(3) Remove the tree screws G attaching the Tuner board as-sembly.Fig.11Solder pointCN707Ground wireFSolder pointCN102GG1-10 (No.MB593)3.1.7 Removing the Function board assembly (See Fig.12)(1) Disconnect the card wire from LCD board assembly con-nected to connector CN103 of the Function board assem-bly.(2) Remove the four screws H attaching the Function boardassembly.Fig.123.1.8 Removing the Power switch board assembly (See Fig.13)(1) Disconnect the connector wire from LCD board assemblyconnected to connector CN709 of the Power switch boardassembly.(2) Remove the three screws J attaching the Power switchboard assembly.Fig.13CN103HHHHJJCN709